LayUI系列（四）之增删改查的实现-阿里云开发者社区

前言

在前三篇layui博客的基础上继续完善，这篇博客增加了数据表格来实现增删改查

这里要注意layui需要使用2.6以上的版本

dao方法的编写

package com.zking.dao;
import java.util.List;
import java.util.Map;
import com.zking.entity.User;
import com.zking.util.BaseDao;
import com.zking.util.PageBean;
import com.zking.util.StringUtils;
public class UserDao extends BaseDao<User> {
  /**
   * 查询结果携带角色名称
   * @param user
   * @param pageBean
   * @return
   * @throws Exception
   */
  public List<Map<String, Object>> userRole(User user, PageBean pageBean) throws Exception {
    String sql = "SELECT u.* ,\r\n" + 
        "(CASE \r\n" + 
        " WHEN u.rid='1' THEN\r\n" + 
        "   '管理员'\r\n" + 
        " WHEN u.rid='2' THEN\r\n" + 
        "   '发起者'\r\n" + 
        " WHEN u.rid='3' THEN\r\n" + 
        "   '审批者'\r\n" + 
        " WHEN u.rid='4' THEN\r\n" + 
        "   '参与者'\r\n" + 
        " WHEN u.rid='5' THEN\r\n" + 
        "   '会议室管理员'  \r\n" + 
        " ELSE\r\n" + 
        "   '其他'\r\n" + 
        "END\r\n" + 
        ") rname\r\n" + 
        "FROM t_oa_user u where 1=1";
    String name = user.getName();
    if(StringUtils.isNotBlank(name)) {
      sql +=" and name like '%"+name+"%'";
    }
    return super.executeQuery(sql, pageBean);
  }
  public int add(User user) throws Exception {
    String sql = "insert into t_oa_user(name,loginName,pwd) values(?,?,?)";
    return super.executeUpdate(sql, user, new String[] {"name","loginName","pwd"});
  }
  public int del(User user) throws Exception {
    String sql = "delete from t_oa_user where id = ?";
    return super.executeUpdate(sql, user, new String[] {"id"});
  }
  public int edit(User user) throws Exception {
    String sql = "update t_oa_user set name=?,loginName=?,pwd=? where id = ?";
    return super.executeUpdate(sql, user, new String[] {"name","loginName","pwd","id"});
  }
}

servlet的编写

package com.zking.web;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.zking.dao.UserDao;
import com.zking.entity.User;
import com.zking.framework.ActionSupport;
import com.zking.framework.ModelDriver;
import com.zking.util.PageBean;
import com.zking.util.R;
import com.zking.util.ResponseUtil;
public class UserAction extends ActionSupport implements ModelDriver<User> {
  private User user = new User();
  private UserDao ud = new UserDao();
  public void userRole(HttpServletRequest req, HttpServletResponse resp) {
    try {
      PageBean pageBean = new PageBean();
      pageBean.setRequest(req);
      List<Map<String, Object>> userRole = ud.userRole(user, pageBean);
      ResponseUtil.writeJson(resp, R.ok(0, "查询成功", pageBean.getTotal(), userRole));
    } catch (Exception e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }
  public void add(HttpServletRequest req, HttpServletResponse resp) {
    try {
      int add = ud.add(user);
      ResponseUtil.writeJson(resp, R.ok(0, "新增成功"));
    } catch (Exception e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }
  public void del(HttpServletRequest req, HttpServletResponse resp) {
    try {
      int add = ud.del(user);
      ResponseUtil.writeJson(resp, R.ok(0, "删除成功"));
    } catch (Exception e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }
  public void edit(HttpServletRequest req, HttpServletResponse resp) {
    try {
      int add = ud.edit(user);
      ResponseUtil.writeJson(resp, R.ok(0, "修改成功"));
    } catch (Exception e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }
  @Override
  public User getModel() {
    // TODO Auto-generated method stub
    return user;
  }
}

R工具类

package com.zking.util;
import java.util.HashMap;
public class R extends HashMap{
  public R data(String key, Object value) {
    this.put(key, value);
    return this;
  }
  public static R ok(int code, String msg) {
    R r = new R();
    r.data("success", true).data("code", code).data("msg", msg);
    return r;
  }
  public static R error(int code, String msg) {
    R r = new R();
    r.data("success", false).data("code", code).data("msg", msg);
    return r;
  }
  public static R ok(int code, String msg,Object data) {
    R r = new R();
    r.data("success", true).data("code", code).data("msg", msg).data("data", data);
    return r;
  }
  public static R ok(int code, String msg, long count, Object data) {
    R r = new R();
    r.data("success", true).data("code", code).data("msg", msg).data("count", count).data("data", data);
    return r;
  }
}

主界面jsp代码

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ include file="/common/header.jsp" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript" src="static/js/main.js"></script> 
<style type="text/css">
.layui-tab-content,.layui-tab,.layui-from,.layui-table-box,.layui-body,.layui-tab-item,.layui-tab-item layui-show,.layui-table-body layui-table-main{
  height:100%;
} 
</style>
</head>
<body>
<div class="layui-layout layui-layout-admin">
  <div class="layui-header">
    <div class="layui-logo layui-hide-xs layui-bg-black">layout demo</div>
    <!-- 头部区域（可配合layui 已有的水平导航） -->
    <ul class="layui-nav layui-layout-left">
      <!-- 移动端显示 -->
      <li class="layui-nav-item layui-show-xs-inline-block layui-hide-sm" lay-header-event="menuLeft">
        <i class="layui-icon layui-icon-spread-left"></i>
      </li>
      <!-- Top导航栏 -->
      <li class="layui-nav-item layui-hide-xs"><a href="">nav 1</a></li>
      <li class="layui-nav-item layui-hide-xs"><a href="">nav 2</a></li>
      <li class="layui-nav-item layui-hide-xs"><a href="">nav 3</a></li>
      <li class="layui-nav-item">
        <a href="javascript:;">nav groups</a>
        <dl class="layui-nav-child">
          <dd><a href="">menu 11</a></dd>
          <dd><a href="">menu 22</a></dd>
          <dd><a href="">menu 33</a></dd>
        </dl>
      </li>
    </ul>
    <!-- 个人头像及账号操作 -->
    <ul class="layui-nav layui-layout-right">
      <li class="layui-nav-item layui-hide layui-show-md-inline-block">
        <a href="javascript:;">
          <img src="//tva1.sinaimg.cn/crop.0.0.118.118.180/5db11ff4gw1e77d3nqrv8j203b03cweg.jpg" class="layui-nav-img">
          tester
        </a>
        <dl class="layui-nav-child">
          <dd><a href="">Your Profile</a></dd>
          <dd><a href="">Settings</a></dd>
          <dd><a href="login.jsp">Sign out</a></dd>
        </dl>
      </li>
      <li class="layui-nav-item" lay-header-event="menuRight" lay-unselect>
        <a href="javascript:;">
          <i class="layui-icon layui-icon-more-vertical"></i>
        </a>
      </li>
    </ul>
  </div>
  <div class="layui-side layui-bg-black">
    <div class="layui-side-scroll">
      <!-- 左侧导航区域（可配合layui已有的垂直导航） -->
      <ul id="menu" class="layui-nav layui-nav-tree" lay-filter="menu">
       <li class="layui-nav-item layui-nav-itemed">
          <a class="" href="javascript:;">menu group 1</a>
          <dl class="layui-nav-child">
            <dd><a href="javascript:;">menu 1</a></dd>
            <dd><a href="javascript:;">menu 2</a></dd>
            <dd><a href="javascript:;">menu 3</a></dd>
            <dd><a href="">the links</a></dd>
          </dl>
        </li>
        <li class="layui-nav-item">
          <a href="javascript:;">menu group 2</a>
          <dl class="layui-nav-child">
            <dd><a href="javascript:;">list 1</a></dd>
            <dd><a href="javascript:;">list 2</a></dd>
            <dd><a href="">超链接</a></dd>
          </dl>
        </li>
        <li class="layui-nav-item"><a href="javascript:;">click menu item</a></li>
        <li class="layui-nav-item"><a href="">the links</a></li> 
      </ul>
    </div>
  </div>
  <div class="layui-body">
    <!-- 内容主体区域 -->
<div class="layui-tab" lay-filter="demo" lay-allowclose="true" style="height:100%;">
  <ul class="layui-tab-title">
    <li class="layui-this" lay-id="11">网站设置</li>
  </ul>
  <div class="layui-tab-content">
    <div class="layui-tab-item layui-show">内容1</div>
  </div>
</div>
  </div>
  <div class="layui-footer">
    <!-- 底部固定区域 -->
            底部固定区域
  </div>
</div>
<script>
//JS 
</script>
</body>
</html>

js代码

var element,layer,util,$;
layui.use(['element', 'layer', 'util'], function(){
   element = layui.element
  ,layer = layui.layer
  ,util = layui.util
  ,$ = layui.$;
  $.ajax({
    url:'permission.action?methodName=menus',
        dataType:'json',
        success:function(data){
          console.log(data)
          var htmlStr = '';
          $.each(data,function(i,n){
            htmlStr +='<li class="layui-nav-item layui-nav-itemed">';
            htmlStr +='<a class="" href="javascript:;">'+n.text+'</a>';
            if(n.hasChildren){
              var children=n.children;
              htmlStr +='<dl class="layui-nav-child">';
              $.each(children,function(index,node){
                htmlStr +='<dd><a href="javascript:;" onclick="openTab(\''+node.text+'\',\''+node.attributes.self.url+'\',\''+node.id+'\')">'+node.text+'</a></dd>';
              })
              htmlStr +='</dl>';
            }
            htmlStr +='</li>';
          })
          $("#menu").html(htmlStr);
          element.render('menu');
        } 
  });
});
function openTab(title,content,id){
  var $node = $('li[lay-id="'+id+'"]');
  console.log($node)
  if($node.length == 0){
    //新增一个Tab项
      element.tabAdd('demo', {
        title: title //用于演示
        ,content: "<iframe frameborder='0' src='"+content+"' scrolling='auto' style='width:100%;height:100%;'></iframe>"
        ,id: id //实际使用一般是规定好的id，这里以时间戳模拟下
      })
  }
   element.tabChange('demo', id); //切换到：用户管理
}

数据表格jsp界面

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%@ include file="/common/header.jsp" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/javascript" src="static/js/system/userManage.js"></script> 
<title>Insert title here</title>
</head>
<body>
<!-- 搜索栏 -->
  <div class="layui-form-item">
    <div class="layui-inline">
      <label class="layui-form-label">用户名：</label>
      <div class="layui-input-inline">
        <input type="text" id="name" placeholder="请输入用户名" autocomplete="off" class="layui-input">
      </div>
    </div>
    <div class="layui-inline">
      <div class="layui-input-inline">
        <button id="btn_search" type="button" class="layui-btn layui-btn-normal">
          <i class="layui-icon layui-icon-search"></i>
          查询
        </button>
        <button id="btn_add" type="button" class="layui-btn">新增</button>
      </div>
    </div>
  </div>
<table class="layui-hide" id="test" lay-filter="test"></table>
<script type="text/html" id="toolbarDemo">
  <div class="layui-btn-container">
    <button class="layui-btn layui-btn-sm" lay-event="getCheckData">获取选中行数据</button>
    <button class="layui-btn layui-btn-sm" lay-event="getCheckLength">获取选中数目</button>
    <button class="layui-btn layui-btn-sm" lay-event="isAll">验证是否全选</button>
  </div>
</script>
<script type="text/html" id="barDemo">
  <a class="layui-btn layui-btn-xs" lay-event="edit">编辑</a>
  <a class="layui-btn layui-btn-danger layui-btn-xs" lay-event="del">删除</a>
</script>
</body>
</html>

js代码

var table,$,layer;
var row;
layui.use(['table','jquery'], function(){
  table = layui.table
  ,layer=layui.layer
  ,$=layui.jquery;
  initTable();
  $("#btn_search").click(function(){
    query();
  })
  $("#btn_add").click(function(){
    row = null;
    edit("新增界面");
  })
});
function edit(title){
   layer.open({
         type: 2,                    //layer提供了5种层类型。可传入的值有：0（信息框，默认）1（页面层）2（iframe层）3（加载层）4（tips层）
         title:title,
         area: ['660px', '340px'],   //宽高
         skin: 'layui-layer-rim',    //样式类名
         content: 'jsp/system/userEdit.jsp', //书本编辑页面
         btn:['保存','关闭'],
         yes: function(index, layero){
           //调用子页面中提供的getData方法，快速获取子页面的form表单数据
             let data= $(layero).find("iframe")[0].contentWindow.getData();
             console.log(data);
             //判断title标题
             let methodName="add";
             if(title=="编辑")
               methodName="edit";
             $.post('user.action?methodName='+methodName,
                 data,function(rs){
               if(rs.success){
                 //关闭对话框
                 layer.closeAll();
                 //调用查询方法刷新数据
                 query();
               }else{
                 layer.msg(rs.msg,function(){});
               }
             },'json');
         },
         btn2: function(index, layero){
           layer.closeAll();
         }
      });
}
function query(){
  table.reload('test', {
      where: { //设定异步数据接口的额外参数，任意设
        name: $("#name").val()
      }
   ,request: {
        pageName: 'page' //页码的参数名称，默认：page
        ,limitName: 'rows' //每页数据量的参数名，默认：limit
      }
    }); //只重载数据
}
function initTable(){
  table.render({
      elem: '#test'
      ,url:'user.action?methodName=userRole'
      ,toolbar: '#toolbarDemo' //开启头部工具栏，并为其绑定左侧模板
      ,defaultToolbar: ['filter', 'exports', 'print', { //自定义头部工具栏右侧图标。如无需自定义，去除该参数即可
        title: '提示'
        ,layEvent: 'LAYTABLE_TIPS'
        ,icon: 'layui-icon-tips'
      }]
      ,title: '用户数据表'
      ,cols: [[
        {type: 'checkbox', fixed: 'left'}
        ,{field:'id', title:'ID', width:80, fixed: 'left', unresize: true, sort: true}
        ,{field:'loginName', title:'账户名', width:120, edit: 'text'}
        ,{field:'name', title:'用户名', width:150, edit: 'text', templet: function(res){
          return '<em>'+ res.name +'</em>'
        }}
        ,{field:'pwd', title:'密码', width:80, edit: 'text', sort: true}
        ,{field:'rname', title:'角色名称', width:100}
        ,{fixed: 'right', title:'操作', toolbar: '#barDemo', width:150}
      ]]
      ,page: true
    });
    //头工具栏事件
    table.on('toolbar(test)', function(obj){
      var checkStatus = table.checkStatus(obj.config.id);
      switch(obj.event){
        case 'getCheckData':
          var data = checkStatus.data;
          layer.alert(JSON.stringify(data));
        break;
        case 'getCheckLength':
          var data = checkStatus.data;
          layer.msg('选中了：'+ data.length + ' 个');
        break;
        case 'isAll':
          layer.msg(checkStatus.isAll ? '全选': '未全选');
        break;
        //自定义头工具栏右侧图标 - 提示
        case 'LAYTABLE_TIPS':
          layer.alert('这是工具栏右侧自定义的一个图标按钮');
        break;
      };
    });
    //监听行工具事件
    table.on('tool(test)', function(obj){
      row = obj.data;
      //console.log(obj)
      if(obj.event === 'del'){
        layer.confirm('确认删除吗?', {icon: 3, title:'提示'}, function(index){
          $.post('user.action',{
            'methodName':'del',
            'id':row.id
          },function(rs){
            if(rs.success){
                   //调用查询方法刷新数据
                   query();
                 }else{
                   layer.msg(rs.msg,function(){});
                 }
          },'json');
          layer.close(index);
        });
      } else if(obj.event === 'edit'){
        edit('编辑');
      }
    });
}

编辑界面

<%@ page language="java" contentType="text/html; charset=UTF-8"
  pageEncoding="UTF-8"%>
<%@include file="/common/header.jsp"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/javascript" src="static/js/system/userEdit.js"></script>
<title>用户新增</title>
</head>
<style>
.layui-form-select dl{
  max-height:150px;
}
</style>
<body>
<div style="padding:10px;">
    <form class="layui-form layui-form-pane" lay-filter="user">
        <input type="hidden" name="id"/>
        <div class="layui-form-item">
            <label class="layui-form-label">用户名称</label>
            <div class="layui-input-block">
                <input type="text" id="name" name="name" autocomplete="off" placeholder="请输入用户名" class="layui-input">
            </div>
        </div>
        <div class="layui-form-item">
            <label class="layui-form-label">用户角色</label>
            <div class="layui-input-block">
                <select name="rid">
                    <option value="">---请选择---</option>
                    <option value="1">管理员</option>
                    <option value="2">发起者</option>
                    <option value="3">审批者</option>
                    <option value="4">参与者</option>
                    <option value="5">会议管理员</option>
                </select>
            </div>
        </div>
        <div class="layui-form-item">
            <label class="layui-form-label">登录账号</label>
            <div class="layui-input-block">
                <input type="text" name="loginName" lay-verify="required" placeholder="请输入账号" autocomplete="off" class="layui-input">
            </div>
        </div>
        <div class="layui-form-item">
            <label class="layui-form-label">登录密码</label>
            <div class="layui-input-block">
                <input type="password" name="pwd" placeholder="请输入密码" autocomplete="off" class="layui-input">
            </div>
        </div>
    </form>
</div>
</body>
</html>

js代码

let layer,form,$;
layui.use(['layer','form','jquery'],function(){
  layer=layui.layer,form=layui.form,$=layui.jquery;
  initData();
});
function initData(){
  console.log(parent.row);
  if(null!=parent.row){
       //因为layui.each内部的逻辑问题导致的所以要先深拷贝一份然后再去val
       //parent.row：表格行对象
       form.val('user',$.extend({}, parent.row||{}));
       $('#name').attr('readonly','readonly');
  }
}
function getData(){
    return form.val('user');
}

运行效果如下：

LayUI系列（四）之增删改查的实现

前言

dao方法的编写

servlet的编写

R工具类

主界面jsp代码

js代码

数据表格jsp界面

js代码

编辑界面

js代码

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